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Sheftic Stack > Important Primary Shit > Flashcards

Important Primary Shit Flashcards

1
Q

What is a support function of the SFP system?

A

Used to clean up RWST

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2
Q

What is the lowest the SFP can be drained?

A

Suction lines are only 19.5” below surface

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3
Q

Will cross tying the SFP system thru purification piping prevent boiling?

A

No, only delay it

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4
Q

What is a function of containment?

A

Provides Biological shielding

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5
Q

What is the purpose of the divider barrier seal?

A

Prevents flow of steam and air from bypassing the ice condenser

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6
Q

What are the suction sources for the CEQ Fan?

A

SG Enclosures

PZR Doghouse

CLV Fan Rms

Instrument Rm

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7
Q

What happens on a lo-lo glycol expansion tank level?

A

Expansion tank outlet valves VSO-20/21 close

CIVs VCR-10/20 Close (outside containment)

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8
Q

What is the flowpath thru the Ice Condenser?

A

1 psf opens lower inlet doors

turning vanes to bottom of baskets

thru intermediate and top deck doors to upper ctmt

condensed by CTS and goes back to lower thru cavity drains

condensed steam/melted ice drains to lower volume

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9
Q

What is the function of the containment spray system?

A

Limits post accidend PRESSURE and TEMP

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10
Q

What is the purpose of NAOH in the CTS system?

A

Makes Recirc Sump pH between 7-10

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11
Q

Why do the SAT outlet valves and educator sypply valves close on a lo-lo SAT level alarm?

A

Prevents gas binding the pump with nitrogen

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12
Q

What happens if both Unit 1 aux exhaust fans are lost?

A

12-RRV-306 closes

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13
Q

What are the AES Fan suction sources?

A 
CTS Hx
RHR Hx
SI Pump
RHR Pump
CCP and PDP 
CTS Pump
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14
Q

What must we do when working in the SFP / moving fuel?

A

Manually place AFX in charcoal filter mode.

Still get a signal on High Rad

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15
Q

Purpose of the Core Barrel

A

primary support

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16
Q

Purpose of the Thermal Shield

A

protect from neutron embrittlement

some preheating

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17
Q

Purpose of the core support casting

A

prevents movement of core barrel by fitting in keyways

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18
Q

Purpose of the diffuser plate

A

provides uniform flow to lower core plate

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19
Q

Purpose of the lower core plate

A

has 4 holes and directs flow thru each assembly

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20
Q

Purpose of the core baffle / former

A

maintains rectangular fuel assemblies in circular pattern

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21
Q

Primary source of neutrons for core

A

spontaneous fission of Californium 252

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22
Q

Secondary source of neutrons for core

A

beryllium activated by gamma

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23
Q

What is the flowpath of water in the vessel?

A

enters thru 4 nozzles

98.5% down bw core barrel and vessel wall
1% leaks by to outlet nozzles
.5% to upper head

flow bw thermal shield and barrel for cooling

97% up thru support casting, diffuser plate and lower core plate
.5% bw barrel and baffles
2.5% up control rod guide thimbles

coolant mixes in upper internals and exits outlet nozzles

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24
Q

Which RVLIS correlation is used when filling and venting RCS with RCP bump method?

A

Upper Plenum

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25
Q

Narrow Range RVLIS is used when?

A

NO RCPs

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26
Q

Wide Range RVLIS is used when?

A

WITH RCPs

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27
Q

Upper Plenum RVLIS is used when?

A

NO RCPs

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28
Q

What are the Leakage Limits for the RCS?

A

NO pressure boundary

0.8 (1.0) gpm Unidentified

10 gpm Identified

150 gpd for 1 SG

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29
Q

What is RCS Leak Detection required to detect?

A

1 gpm leak within 4 hours

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30
Q

What does the Orifice on the Rx Vessel Head vent do?

A

prevents leakage greater than capacity of 1 CCP

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31
Q

Why is RVLIS pressure used for the subcooling meter?

A

It’s outside containment

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32
Q

What RCS penetration is not into the flow path?

A

RHR Suction from Loop 2 Hot Leg

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33
Q

What penetrations are in the RCS flowpath

A

Wide and Narrow Range RTDs

PZR Spray Lines

RCS Sampling

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34
Q

Which loop does not have midloop indication?

A

Loop 1

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35
Q

What loops are the PZR Spray Lines on?

A

3 and 4 cold leg

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36
Q

Which loop is the RHR Suction on?

A

2 Hot Leg

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37
Q

What loop is the PZR Surge line on?

A

Loop 3

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38
Q

What loops are RVLIS on?

A

Loop 1 and 3 Hot Legs

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39
Q

What loops are Sample lines on in the RCS?

A

Loops 1 and 3 Hot Legs

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40
Q

Which loops are WR Pressure on?

A

1 and 2 Hot Legs

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41
Q

Which loop is normal LD on?

A

Loop 4 intermediate leg

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42
Q

What are the interlocks for starting a RCP?

A

Bearing lift pump motor starter closed

Bearing Lift Oil Pressure 510#

43
Q

What is the purpose of the RCP Flywheel?

A

Helps remove decay heat immediately after a trip

44
Q

What are the RCP Seal Return flowpaths?

A

1 - SW Hx to CCP Suction

45
Q

What is the RCP Seal injection flopath?

A

5 gpm down RCP shaft into RCS

3 gpm thru #1

3 gph thru #2

100 cc/day #3

46
Q

What happens to seal return if VCT level goes up to 70%?

A

pressure rises also. Seal return flow goes down. Must vent VCT to get it back

47
Q

What will give you a Refueling water sequence?

A

BOTH QLC-451 AND 452 at 2.5%

48
Q

When using emergency borating, what must be done to the BAT pump?

A

manually shifted to FAST speed

49
Q

Where does alternate dilution go in automatic?

A

TOP and BOTTOM of VCT

50
Q

What instrument feeds into the East CCP ELO?

51
Q

What instrument feeds into the West CCP ELO?

52
Q

What must you do on a LOOP regarding the seal return system and why?

A

Close seal return iso valve QCM-350 to prevent steam binding CCP

53
Q

What is the normal temperature, level and pressure of the PRT?

A

100*F

83%

3#

54
Q

What instruments are used for Cold Overpressure?

A

NRV-152 is controlled by NPS-122 (Loop 1 WR)

NRV-153 is controlled by NPS-121 (Loop 2 WR)

55
Q

How many acoustic monitors for the PZR Safeties?

A

1 for each safety

56
Q

How many acoustic monitors for the PZR PORVs?

A

1 total for all 3 PORVs

57
Q

What is the gallon per percent for the VCT?

A

19 gal / %

58
Q

What is the gallon per percent for the PZR?

A

75 gal / %

59
Q

What is built into the pressurizer master level controller to protect the RCP Seals?

A

Stop on QRV-251 to prevent isolating seal injection.

~47 gpm

60
Q

What is the peak clad temperature for ECCS Acceptance Criteria?

61
Q

What is the max clad oxidation for ECCS Acceptance Criteria?

62
Q

What is the maximum hypotetical Hydrogen Generation for ECCS Acceptance Criteria?

63
Q

When do we go on Cold Leg Recirc?

A

manually aligned when RWST lowers to 20%.

64
Q

What is the suction source for cold leg recirc?

A

RHR suction is aligned to the Recirculation Sump.

RHR provides suction to CCPs and SI pps in addition to the RCS.

65
Q

When do we go on Hot Leg Injection?

A

5.5 - 7.5 hours after LOCA.

Not before 5.5 hrs to avoid core uncovery due to boil off

Not after 7.5 to prevent boron precipitation in the reactor

66
Q

What do you have to do before using RHR Spray?

A

have to close RHR loop injection valves before aligning spray (prevents runout)

67
Q

Where do we take suction from for RHR Spray?

A

Recirculation Sump

68
Q

How long must we wait to use RHR Spray and why?

A

> 50 minutes after accident

allows for adequate heat removal to have occurred and CCP and SI for decay heat removal

69
Q

Where does RHR tap into CVCS?

A

Before the LD Hx

70
Q

How do we protect the RHR pump from runout when going to spray?

A

Close RHR Loop injection valves first

71
Q

How do we protect the RHR pump from runout when going to hot leg recirc?

A

Cold leg isolation valve closed first, then hot leg is open.

72
Q

While in HOT SBY with all RCPs running, The RC loop flow indicators for RCP #11 all fail LOW with the pump still operating. The probable cause of the total loss of flow indication would be a failure of the associated:

A

Outside Flow Tap

73
Q

Which ONE of the following is a function of the Rx Vessel Head Vent System?

A

Removes non-condensable gas or steam from the Rx vessel head under accident conditions.

74
Q

What conditions must be satisfied to start a RCP?

A

DP across No 1 seal is greater than 215 psig

75
Q

During refueling, the divider barrier and missile blocks separating RC and refueling cavity are removed. As a result, higher flow rates in the containment purge exhaust system will:

A

Prevent the formation of vapor clouds on the water

76
Q

What are the ECCS Pumps order of Injection with Normal Injection Pressures?

A

CCP - 2300#

SI - 1600#

Accumulators - 600#

RHR - 200#

77
Q

On a LB LOCA, what would the expected flowrate be of your pumps if pressures were met for injecting? (runout flows)

A

CCP- 550 gpm

SI - 600 gpm

RHR - 4500 gpm

78
Q

What is the design basis for Rods?

A

Maintains Tavg within 5F of program and restores Tavg within 1F of program following:

  1. 10% step load change
  2. 5% / min ramped load change
  3. 50% step load change (10% rods)
79
Q

What is the output of the Rod Drive MG set?

80
Q

What are the inputs to Rod Control?

A

Auctioneered High Tave

Auctioneered High PRNI

MPC-253, Turbine 1st Stage Impulse Pressure

81
Q

What does the SCD Power Cabinet feed into?

A

S/D Banks CD

82
Q

What does the 1AC Power Cabinet feed into?

A

Control Banks AC and S/D Bank A

83
Q

What does the 1BD Power Cabinet feed into?

A

Control Banks BD and S/D Bank B

84
Q

What does the 2AC Power Cabinet feed into?

A

Control Banks AC and S/D Bank A

85
Q

What does the 2BD Power Cabinet feed into?

A

Control Banks BD and S/D Bank B

86
Q

Explain how the Stationary, Movable and Lift Coils work together for outward Rod Motion

A

Stationary Full Current

Moveable Gripper On

Stationary Off

Lift Coil On

Stationary Full On

Moveable Gripper Off

Lift Coil Off

Stationary Half Current

87
Q

Explain how the Stationary, Movable and Lift Coils work together for inward Rod Motion

A

Stationary Full Current

Lift Coil On

Movable Gripper On

Stationary Off

Lift Coil Off

Stationary On

Moveable Off

Stationary Half Current

88
Q

When will you get bank overlap?

A

Bank Selector Switch in Auto or Manual

89
Q

How much overlap does bank overlap provide?

A

100 step overlap

2 banks moving together for 100 steps

90
Q

What are the Rod Control Power Cabinet Urgent Failures?

A 
Logic Error
Regulation Failure
Phase Failure
Multiplexing Error
Card Removed
91
Q

If you have an Urgent Failure on the Rod Logic Cabinet, which Rods are affected?

92
Q

If you have an Urgent Failure on the Rod Power Cabinet, which Rods are affected?

A

Rods in groups for that cabinet

93
Q

What does the Variable Gain Unit do in Rod Control?

A

Increases the output at low power

Given reactivity change at low power has a smaller effect on power than at high power

94
Q

What does the Rod Control Mismatch Rate Comparator do?

A

Compares rate of change bw Turbine 1st Stage Pressure and NIs

Provides faster response to transients

95
Q

What is the Rod Speed for the S/D Banks?

96
Q

What does indication read for rod speed in auto for S/D Banks C and D in Auto

A

No Indication (0)

97
Q

How fast do rods move in Manual?

98
Q

How fast do rods move in Auto?

99
Q

When to control rods begin moving?

A

+/- 1.5*F difference between Tavg and Tref

100
Q

When do rods move 8 spm?

A

1.5-3*F temperature error

101
Q

When do rods stop moving?

A

1*F temperature error

102
Q

What will give you a NON-URGENT FAILURE on the rod power cabinet?

A

Loss of redundant power to power or logic cabinet

POWER IS NON-URGENT

103
Q

During a power ascension, w reactor power at 48%, control bank C group 1 rod B-8 drops. Prior to the drop, it was at 228 steps. While restoring the rod, a control rod urgent failure alarm occurs. Why?

A

urgent failure will be generated in the other bank of rods in that power cabinet due to all lift coil disconnect switches open for that entire group

Sheftic Stack (79 decks)

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